Finding the Third Proportional to 10,138,626 and 21,115,962

Step by Step Solution

1. Step 1: Write the proportion equation
   10,138,626 : 21,115,962 = 21,115,962 : x
2. Step 2: Convert to fraction form
   10,138,626/21,115,962 = 21,115,962/x
3. Step 3: Cross multiply
   10,138,626x = 21,115,962 × 21,115,962
4. Step 4: Simplify right side
   10,138,626x = 445,883,851,185,444
5. Step 5: Solve for x
   x = 445,883,851,185,444/10,138,626
6. Step 6: Final answer
   x = 43,978,725.64